Any good crochet artist will tell you that most crochet patterns can be mastered more easily simply by sticking to one color yarn. Once you begin adding different colors to the same stitch, it becomes an integrative process as well as a learning one.
The multiple for this project is 4 or 8 depending on how you want your blocks to appear. You can easily adjust your block to 5,6 or 7 if you want longer blocks on the front of your crochet piece. This will make a very nice crochet afghan or baby blanket. It is double thick in places so it will be very warm and use extra yarn. It will work great as a scrap buster, for those extra balls of yarn you have around.